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Related to federated identity is single sign-on (SSO), in which a user's single authentication ticket, or token, is trusted across multiple IT systems or even organizations. SSO is a subset of federated identity management, as it relates only to authentication and is understood on the level of technical interoperability.
Digital identity platforms that allow users to log onto third-party websites, applications, mobile devices and gaming systems with their existing identity, i.e. enable social login, include:
- Microsoft account - Formerly Windows Live ID
- Yahoo! - not only can users use their Yahoo! ID to log onto other sites, but users can log onto Yahoo! with their Google or Facebook IDs.
- Mozilla Persona
In many cases there is also the possibility to exchange profile information about the user with the third-party site, for example name, address, email, and photo.
Note: Facebook Connect is a delegated ID, not a federated ID.
- Madsen, Paul, ed. (5 December 2005). "Liberty Alliance Project White Paper: Liberty ID-WSF People Service - federated social identity". Retrieved 2013-07-11.